Lock nut



June 10, 194-1. (5, SHEL Y I LOCK NUT Filed May 22, 1939 I INVENTOR. 520/3? 7Zl/me) JZa/g M V CM ATTORNEYS.

Patented June 10, 1941 UNITED STATESPATENT OFFICE LOCK NUT George Tillman Sheley, Indianapolis, Ind. Application May 22, 1939, Serial No. 274,950 (01. 151-36} 2 Claims.

junction with a base, a threaded bolt, and a superimposed unit in a position of advancement on its threaded bolt, just engaging the washer to stress the washer axially.

In the drawing l0 indicates a tempered and springy main body which is a radially split annulus, one tip ll being axially displaced relative to the other tip I2 to produce a low pitch helix, much like lock washers now well known.

Difiering from the well known washers just mentioned, the tip ll of my washer is provided with an integral laterally-projecting tongue I3,

. the pointed tip I4 of which extends substantially tangential of the adjacent main body, with the tip of the tongue pointing away from the tip II by which it is carried. The tongue I3 is twisted or warped relative to the main body in a direction opposite to the pitch of the main body, 1. e., in a direction toward the plane of the adjacent tip I2 with the lower edge of the sharpened tip l4 about in the plane of the lower edge of the adjacent tip [2.

In action, the structure is laid upon a foundation l5, around a threaded shank IS with the.

tips I! and I4 resting on the foundation and the inner extremity of the upper edge of tip ll tips, said widened tip being warped substantially elevated above the plane of the upper surface of tip l2.

As a nut l1 isscrewed to aseat, it engages the upper edge of the warped tip II and forces the same axially, at the same time forcing tip it into the foimdation, the nut sliding somewhat readily over the upstanding tip ll because the direction of rotative movement of the nut is away from the upper edge of tip II.

Unscrewing movement of the nut is resisted by the friction of tip ll thereon, induced by the axial stress under which it has'been placed by {theadvanced nut, and there is a tendency of the upper edge of the tip II to dig into the under face of the nut thus further resisting reverse movement of the nut. However, enforced reverse movement of the nut, even when embedment of tip II in the nut occurs, will cause the sharpened tip M to seat more firmly in the foundation so as to resist slipping of the washer on the foundation while ultimately permitting reverse movement of the nut relative to the washer.

I claim as my invention:-

1. A lock-washer comprising a radially-split spring annulus of uniform thickness the substantially radial tips of which face each other and one tip being widened outwardly into an integral tongue projecting angularly outwardly away from the radially-router ends of both of said tips, said widened tip being warped substantially about a radiusof the annulus medially of the circumferential extent of the widened portion so as to project its radial end above the general plane of the annulus and the free end of the tongue below the general plane of the annulus, whereby the said widened tip and free tongue end may be simultaneously engaged by opposing clamping members. 4

2. A lock-washer comprising a radially-split spring annulus of uniform thickness the sub-' stantially radial tips of {their face each other and one tip being widen d outwardly into an integral tongue projecting angularly outwardly away from the radially-outer ends or both of said about a radius of the annulus'medially of the circumferential extent of the widened portion so- 'as toproject its radial end above the general plane of the annulus and the free end of the tongue below the general plane of the annulus. whereby the said widened tip and free tongue end may be simultaneously engaged by opposing clamping members, the free end of the tongue being tapered to a point.

GEORGE TILLMAN SHELEY. 

